Proceedings PaperGrazing incidence ring resonator for visible wavelength free-electron laser
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The key optical components for a grazing-incidence ring resonator are considered. Grazing-incidence mirrors are described, and attention is focused on a surface-fabrication process, mirror size, shape, and curvature, and single-crystal silicon substrate used for coating. Surface roughness, mechanical contact profilometry, optical interferometry, and wavefront errors are discussed, as well as normal-incidence mirrors. Consideration is given to grazing-incidence, normal-incidence high-reflectance, and sideband-suppression thin-film coatings. Alignment procedures and tools including dynamic alignment, a fast steering mirror, and coarse path-length adjustment with an outcoupler mount are covered.